testing pr

src/test/java/org/zipcoder/store/TriangleTeset.java

+package org.zipcoder.store;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TriangleTeset {
+
+    @Test
+    public void one(){
+        Assert.assertEquals("*\n", triangle(1));
+    }
+
+    @Test
+    public void three(){
+        Assert.assertEquals(" *\n***\n", triangle(3));
+    }
+
+    @Test
+    public void five(){
+        Assert.assertEquals("  *\n ***\n*****\n", triangle(5));
+    }
+
+    @Test
+    public void seven(){
+        Assert.assertEquals("   *\n  ***\n *****\n*******\n", triangle(7));
+    }
+
+    private String triangle(int number) {
+        StringBuilder builder = new StringBuilder();
+
+        int star = 1;
+        int space = number/2;
+
+        while(star <= number) {
+            add(builder, ' ', space);
+            add(builder, '*', star);
+            builder.append('\n');
+            star += 2;
+            space -= 1;
+        }
+
+        return builder.toString();
+    }
+
+    private void add(StringBuilder builder, char value, int numberOfTimes) {
+        for (int i = 0; i < numberOfTimes; i++) {
+            builder.append(value);
+        }
+    }
+}